Technical Changes to Historical Current Employment Statistics Data on February 3, 2012

With the release of January 2012 data on February 3, 2012, in addition to the normal benchmark process, the Current Employment Statistics survey recalculated historical data for aggregate series and annual averages for hours and earnings data prior to April 2010.

In previous years, changes in the industry aggregation structure that resulted from the annual sample adequacy review had not included a reaggregation of the series using standard aggregation rules. The differences are minor and relate to rounding. With this change, all aggregate data series were calculated using standard aggregation formulas.

Annual average calculations for hours and earnings data prior to 1990 were calculated using a different formula than has been used for the post 1990 period. The differences in formula resulted in minor differences in the calculated value. With this change, all annual average data now use standardized calculations for the series.

Last Modified Date: February 3, 2012